Technique for processing garbage leachate

Abstract

The invention relates to a process for treating waste leachate, which comprises the steps: (1) water quality and water quantity of the waste leachate is regulated in a regulating tank; (2) the leachate after water quality and quantity regulation is an anaerobic tank and treated by the anaerobic process under 25 DEG C-45DEG C and the anaerobic process time is 50-100 hours; (3) the biogas produced in the anaerobic process is treated and the sludge produced in the anaerobic process is discharged; (4)the leachate after anaerobic process is sent into a hypoxia tank to carry out a hypoxia process and the sludge produced in the hypoxia process is discharged; (5) the leachate after hypoxia process is sent into an aerobic tank to carry out an aerobic process and the sludge produced in the aerobic process is discharged; (6) the leachate after the aerobic process is sent into a membrane biological processor to carry out solid-liquid separation and the reflux is carried out for the sludge produced after the process based on reflux rate 3:1; (7) the leachate after being processed by the membrane biological processor is sent into a middle water tank; (8) the leachate is processed by nanofiltration and the water after being processed is directly metered and discharged or first mixed with the water in the water tank according to certain proportion and then metered and discharged; (9) the concentrated water after nanofiltration is returned back to the regulating tank.

Description

technical field [0001] The invention relates to a process for treating high-concentration organic leachate, in particular to a process for treating landfill leachate. Background technique [0002] Landfill leachate is a kind of high-concentration organic leachate, which is characterized by high concentration of pollutants and complex components. With the different landfill areas, the degree of pretreatment of each landfill is different, and the season of the same landfill is different. Different landfill landfill time will cause great differences in the quality and quantity of landfill leachate. According to the specific situation of landfill leachate water quality, the applicant can be divided into three categories (as shown in Table 1): [0003] Table 1: Landfill Leachate Water Quality Status [0004] project Class I Class II Class III water quality COD cr (mg / L) 20000～ 40000 2000 35000 ...

AI Technical Summary

Problems solved by technology

[0013] Due to the high concentration of ammonia nitrogen in landfill leachate, the general process of treating landfill leachate adopts physical and chemical treatment, such as dosing coagulation, physical stripping, etc., and the effect is not ideal.

Because domestic research on landfill leachate treatment methods has just started, the above-mentioned processes are still not very mature, and there are still various problems, and further in-depth research is needed

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